I've just finished a job that another SI had done some initial work on. Unfortunately (and although they had used cat5 patch panels) they hadn't used the pinouts that everyone else (Probel, Quartz etc.) uses for sending RS422 over cat5. Anyhow - here are the details in case you ever need to convert. Also - it's best to use the signal earth (pins 4 & 6) rather than the chassis ground (pin 1) - especially if you're running between areas.
Another thing - it's best to use 1/4¨ jacks on mixer inputs as increasingly mixers only have a subset of inputs with XLRs!